Printing machine



Dec. 4 1923. l 1,476,072

- E. @Rosse y PRINTING AMACHINE Filed May 5. 1921 4 Sheets-Sheet 1 E. GROSSE PRINTING MACHINE Dec. 4, 1923. 1,476,0724

Filed May 5, 1921 4 sheets-sheet 2 Dec. 4,1923.

E. GROSSE PRINTING MACHINE Filed May 5 4 Sheets-Sheet 4.

Patented Dec. 4, 1923.

EDUARD Gaossn'or waonwrrz, 'NEAR DRESDEN, enniyuiivv.V

' PRINTING MACHINE.

Application filed May 5,

many, have invented certain new and .useful Improvementsvin \Printing 'Machines, of which the following is a specification.

The presentinvention relates toa 'printing press of the platen type withl sheet d elivery device and especially with grippers and spreaders guided by A`means of endless bands, chains or other m'eans ofconveyance. The gripping and spreading devices for sheet delivery are arranged in avery simple and natural manner by being connected to the same means of conveyance which cause the movement of the inking rollers. The grippers, spreaders and inking -rollers are Ajointly guided around the middle part of the press by means of endless bands, chains or other means of conveyance; during this movementare the inking rollers supplied' withl ink from an inking arrangement and ink the form, while the grippers,after the, printing process has been carried out, catch the sheet lying on the platemtake it along, turn it and deposit it with Vtheprinted sideA upward on a table arranged above the press. This represents an extremely simiple yet very appropriate arrangementvwhich keeps the platen absolutely free and accessible from all sides as in platen presses without delivery device. .The form can be pnt in and taken out without any difliculties.

The invention relates alsoto a cylinder inking arrangement over whose large cylinder the inking rollers which are guided around the middle part ofthe press pass in such a manner that the movement of the inking rollers takes place in the opposite direction to the rotary movement of the inking cylinder. By lthus arranging an opposite direction ofthe two movements the travel of the inking rollers. is accelerated'7 as both movements are added and the inking rollers forced to rotate quicker by Ymeans. of the cylinder which rotates in the opposite direction. The result of this arrangementis an excellent distribution of ink, as the inking rollers pass from 5 .to8 times over the inking cylinder, according to the quicker or slower rotation of the latter.

One form of the invention is illustrated v carriage rest the vinking 1921. Serial No. 467,188'.

in the accompanying'V drawings,I ink which v Figure 1 is a side viewy of the platen press;

Fig. 2, a partial side view on an enlarged scale; Fig. 3,amodified form ofthe gripper arrangement;y Fig. 4, a side `Vview of ythe view ofthe gripper in this form of execu-v PATENTYoFri(ze.iv

tion; Fig. 6, a side view of the. platen. press 'y withl partially cut cylinder inking arrange-p` 4 y i ment. l v The middle partnof the platen press, suspended within the `frame 1, is equipped on both sides of its lower andupper portion l with the' disc or sprocket wheels 2 and 3 (Fig.V 1). The sprocket wheel 2 is driven by means of the spur wheels 6, 5 and 4 dimensioned inl such a manner that the'` bands or chains 10 placed around the sprocket wheels 2 and 3 travel once around the body` of the press during each' to-,andfro movement of the platen 7 (Fig. 6).

r1`he platen 7 is moved by means lof a crankV attached tothe spur `wheel 6 and connected at 8` to the platen by means of a rod 9. Over the discs or sprocket wheels 2 and 3, arranged on both sides, run endless steel bandsV o r chains V10. To the latter is connectedV on each side of the press a lroller carriage 411 which follows the movement of the steelgbands and, during each to-and-fro movement of the platen 7, travels once around the center of the press in the direction of the outer. arrow in Fig. 6. On the' `rollers 12, 13 and 14.' y

4The inking rollers 12, 13 4and'ltrotate over the surface vof the ink cylinder 19 and receive from the latter the ink which hasv been transmitted .to the cylinderv19 from v the duct 22 by means of the roller 20 and the distributing rollers 21. rlhe process of receiving ink from the ink cylinder 1 9 takes place in such a way thatv the inkingrollers 1 tinuing their travel the inking rollers trans'- v mitv this ink to the form 23 (Fig. 1), where'- upon the actual printing.l of the sheet or In the proper distance from the carriage i l1 a carriager'l has been connected to the endless steel b-ands in such a manner kthat it is guided from below past the platen 7 in the direction Aof the arrow after the printing has been accomplished.

The carriage 15 (Fig. 2) consists of a pair of gripperspivoted at 26 to an arm 28. The latter is fixed to a yshaft-29 whicheis rigidly connected to a lever arm 30. The latter carries `adjustably s holder 31 for -a guide roller 33V which cooperates with a cam 34. The cam 34 is held by a slotted. bar 35 which .is 'adjustably guided on pins and which lcan be secured yto the press frame in adjusted positionby means of a screw 37. The lcamf34 carries the pin 38 which serves as stop- `for'the arm 39. Asso'on as the arm 39 Vduring-the movement of the carriage in the direction indicated by the arrow touches the pin 38 it is pressed back lby the latter with the resultthat'the gripper 27 opens,` afs indicated by the dotted line.l

.The grippers 27 serve the purpose of catching the printed sheet 40, indicated by dots, while lying'on the platen and to carry it olf. A scale may be provided to 'facilitate the adjustment.

To do their work the grippers move tothe lower edge of the printed sheet, open up, pass fora short distance over the surface of the platen and lplace themselves wit-htheir lower -gripping Vmember under the sheet. As soon `as this has been done, the grippers close on the she'etand carry it over the surface of the platen upward.

yThese movements are caused by the roller 32 hitting the cam v34 of the contact of the arm 39. with the pins 38. During `its movement Varound the center of the 'press the gripper carriage with its grippersris guided past the'cam 34 inthe direction of the arrow. The arm 39 touches now the pin 38 and the grippers 27 open up. Simultaneously, the roller 33 meets the cam 34, the shaft 29 with the arm 28 is'turned and the grippers place themselves on the surface of the platen and enter under the edge of the sheet which is thus; admitted between the upper and lower member of the grippers. As soon as arm 39 has been moved past pin 38, the grippers 27 close on the `sheet by the pressure of a spring arranged on the shaft 26 and the sheet is held securely between them. In the meantime the-platen moves farther to the left away from the gri-ppers 27 and the grippers carry the` sheet upward. l

The adjustable roller V33 with the holder 31-can be omitted. In that case the shaft y29 (Fig. 3) carries a disc 67 provided with notches 68 in its edge and Vengaged by a spring-pressed roller 69 or a spring-pressedpawl which stop the disc after the completion yof one-eighth of a revolution. The disc is wheel 71 strikes against the projection 73 at 75 and is pressed downward. This causes the Vwheel 71 to make a` short turn which is transmitted to the studded disc 67 which catches the arm 28 whereupon the grippers 27 incline towards the surface of the platen.

Arm 39 is in Vengagement'with the stop 72,

nsV

is pressed by the latter and the grippers 27 open up. The lower gripper member 27 moves under-the sheet :and slidesup. lf the grippercarriage has lkept on moving, the lever39 vreleases the stop 72, Jthevgrippers close on the 'sheet by -a spring-pressure and Carr-y.V the sheet upward.

Gollapsing 'of the sheet is prevented -by means of the `long gripper rods common to all platen presses. Strong' and rigid sheets can therefore yeasily be pushed over the surface ofthe platen. To prevent yflimsy paper, as for instance :tissue paper and the like, from collapsing, a supporting-device consisting of a carriage 42 has been provided above the carriage 15.

The carriage 42 consists of a pair yof grippers 42 on both sides of the frame which are connected to the endless steel bands 10 and guided by the latter aroundthe center of the press.

The arms 44 are pivoted atr43 to the carriage 42 and provided with rubber tips 45.. The arms 44 turn on the shafts 43 in such a manner that `their nrubber tips 45 are pressed against the surface of the 4platen and the sheet lying on top of it. The supporting arms 441are connected toweights 46 which Y hold the armsfin supporting yposition against the sheet on the platen. The weights 46 are normal-ly prevented from pressing the arms 44 against the sheet by a spring-pressed lever 48 which is inengagement with a notch` rof a disc 51 secured to the 'upper shaft 43 and prevents the disc andthe shaft 43 from llO turni'n If the carriaoe 42 moves in the D direction of the arrow upward, the lever 48 strikes against the pin 52, the lever 48 is moved around its bearing 53 and released from engagement with the notch in the vdisc 51. The disc 51Ais thus released,;the weights 46 move downward and turn the shafts 43 with their arms 44 far enough to allow the Y rubber tips 45 -to press against the sheet.

Owing to ytheir rough surface the rubber over the surface of the plate-n. upward.; As

the arms 44 should be appliedV to the top of the sheet at the same time as the grippers 27,

the stop 52y is connected to an adjustable slide and can be adjusted high or low at will.

Instead of weights springs may be used to press the supporting arms 44 against. the sheet.

The grippers 27 hold the sheet until it reaches the table 54 (Fig. 1) F'ig. 6. To prevent the sheet from becoming Vbent on the way traveled by the'carr'iage until the table has been reached and to Vturn the'printed side of the sheet upward, it is necessary to provide means for the gradual rotation of the grippers 27. This gradual rotation of the grippers is accomplished by means of the ratchet wheel 55, arranged on the opposite side of the carriage,- and the small toothed wheels 56 and 57 (Fig. 2) or the disc 67 with its studs 70 (Fig. f). I Y

The ratchet wheel 55, having eight teeth or arms, is firmly connected to the cog-wheel 56 (Fig. 2) on a common shaft. Cog-wheel 56 meshes with cog-wheel 57 which firmly rests on the shaft 29. In moving the carriage 15 the ratchet wheel 55 is guided past the stops 58, 59, 60 (Fig. 1). Each stopretains that tooth of theratchet wheel 55 which is closest to the center of the press and compels the ratchet vwheel to complete one-eighth of a revolution whereupon the tooth can pass the stop. The cog-wheel 56 (Fig. 2) cooperates with the ratchet wheel 55 in making one-eighth of a revolution and, being in mesh with the cog-wheel 57, forces the latter to do the same. As the Cog-wheel 57 is again rmly connected to the arm 28 by means ofthe shaft 29, the arm 28 together with the grippers .27 Vwill complete one-eighth of a revolution around the shaft 29. Thus the grippers 27, before reaching the table 54, are forced by four stops to make four turns, each'of which is equal to onefourth of a revolution,`and take up successively the four positions, as shown by the dotted lines in Fig. l.

1f the grippers pass the fourth positionl, the arm 39 strikes against a stop 66 (Fig. 1) in such a manner .that during further rotation the grippers open on their way and drop the sheet which slides now on the table 54. v

The carriage is now guided along the rear side of the press. The ratchet wheel successively passes the stops 62, 63, 64 and 65, is forced by each of them to make one-eighth of a revolution and thus completes -a full turn. )Vith the wheel theV grippers 27 revolve once about the shaft 26 and after passing the stop 65 return to their initial position.

Exactly the Same process takes place, if the arrangement as shown in Fig. 3 is employed where instead of the c0g-wheels 56, 57 the ratchet wheel 71 together with the studded disc 67 is operative.

' The carriage 42 moving in advance of the carriage 15 (Figs. 2 and 4) gradually oecupies during its travel around-the upper disc 3 a reversed position. The shafts 43 which during the upward` movement of the car'- riage are directed upward occupyafter their rotation around the disc 3 a downward position. By this reversal of the formerepositions the weights 46 act in` opposite direction and the disc 51 which was moved by means of the weights in the direction towards the platen is now moved back into the opposite direction'.V .The notchin the disc 51- returns thus to its1position under the tooth of the lever 48, the tooth snaps linto the notch and the device isr locked again. In this locked position it rpasses around the other half of the centerpart of the press and returnsto ,Y n

its original position. Y

f the ink distributing` cylinder 19 is arranged in the upper vpart of the platen press, as shown in Fig. 4,y it is necessary to place the table 54 above the press, becausethe ink cylinder 19 occupies the upper partfof the press and the sheet'can not be delivered directly 'by the carriage 15 to the table 54 'but is taken off the carriage by ymeans of the arms 76, arranged on both sides, and the grippers 87 and carried to the table 54.

The arms 76 Fig. 4 are driven through the mediumof the main crank in connection with the rod 79, the linked-0n rack 78 and the wheel sector 80 firmlyl connected to the arm 76. By ythese intermediary means the arms 76 arerocked by the rod 78 and moved either upward Vor downward over the table The sheet is taken Aoff the surface of the platen by means of the grippers 27 in the manner describedbefore, `with the difference, however, thatthe grippers 27 are provided between their jaws with a spring-tongue 81 (Fig. 5), the sheets being introduced between this tongue and the outer jaw and held vby them after the 'closing of the grippers. The ratchet wheel 82 has only four teeth and completes one-fourth 'of a'revo1u tion at each passage of a stop.

If the sheetha-s been caught by the grippers 27, it is conveyed, by them in cooperation with the arms 44 over the surface of the platen and upward and simultaneously turned. When the grippers reach the stops 83 `and 84 the teeth of the wheel 82 will strike against the stops and cause one-fourth of a revolution each of the arm 28 with the result that the grippers 27 are directed downward'while the edge of the sheet caught by Vthem Y is directedv upward. Simulta-k neously. the grippers 27 are opened far enough by a stop that the sheet is only held loosely by thev tongue 81 and can easily be pulledfout of the grippers 27.

' The arms 76 oscillate until they-reach the pat-h of the carriage 15,- the grippers 87 open by means of the lever 86 passing'a stop 84,

slide with ytheir open jaws over the edge of the sheet, catch it by closing ythe jaws and pull it out of thegrippers 27. The carriage lvcontinues t move, the.;arms 7 6 move back, take the sheet along by means of Atheir grippers 87 and carry it to the table 54. After reaching their nal -position the grippers 87 open throughthe action of a stop and drop thesheet on the table 54.

- The ydelivery device may be removed for carrying out certain kinds of work so that the inki'n'g rollers are operated alone together with the cylinder linking arrangement in such a manner that the above-de scribed cylinder inking arrangement l2, 13, 14 forms with the cylinder 19 which moves in'an opposite direction from that oit' the inlring rollers a printing press withoutdelivery device. In the latter case thecylin- 'der 19 ltogether with the distributing rollers 21 may be arranged in the lower part of the press v(Fig. G) or' in the upper part `of the press (Fig. 4).

V'Cylinder inking as 'shown in the press in Fig. l can also be replaced by' table inking sol that the gripper device cooperates with the table inlring. In `that case the cylinder 9 is replaced by 'fa semi-circularinking table which serves for the purpose of ink distribution. In 4addition a straight inking table may be arranged at `the rear ofthe machine.

arrangement is advisable which causes a slow movement ofthe Ainlrng rollers, l2, 13, 14 and the delivery device 15, 42 at a high speed of the platen; the slower the former move, the better is their work.

This arrangement consists in providing two-roller carriages each and two sets of kdelivery devices for the endless band l0. l? or this purpose the spur wheel 4 is made twice as large asf-shown in the press in `Fig. l. Theetle'ct of this change is that at each toand-fro movement of the platen the band 10 is conveyed vonly one-half of its length. The two roller carriages and two sets ordelivery devices attached to it thus become-operative alternately at each printi-ngfactijon of the platen and run therefore yat half'speed.

Having now particularly described and ascertained the nature of my invention and in what manner the same is to be performed, I declare what I claim and desire to secure by Letters `Patent -is I claim zh' l. In a platen fpress the combination of -a cylinder inking arrangement, a platen, end-r less bands adapted to rotate around the center of the press, and a Vnumber of inking rollers secured to the said bands :by means of carriages in order to rotate around the center oit `the press so that the inking rollers during their travel rotate on the surface of the ink cylinder, and furthermore, of rollers If the press is t0 run at a `high speed, anv

adapted to supply the ink cylinder with ink, a table, and means of taking the printed sheets off theA platen and deliver them to a receiving table, while the inking rollers are led around the center of the press and guided, for the 'purpose of receiving ink, over the ink cylinder rota-ting in the opposite direction to that of the inking rollers in order to cause thereby a quicker rotation of the i'nking rollers on the ink cylinder, subnected to the endless band a distance in ad* vance ot the inklng frollers and their car-V riage and adapted to grip the sheet on the platen and deliver it to a receiving table, substantially as described.

3. In a platen -press the combination of a cylinder inking arrangement, a platen, endless bands: adapted to rotate around the center of the press, Aand a num-ber of inlri'ng rollers secured tothe said bands by means of carriages in order to rotate around the center of the press so that the inking rollers during their travel rotate on the surface ot the ink cylinder and 4furthermore of roll ers adapted to supply the inl; cylinder with ink, and a gripping kdevice connected by means of a pivoted holder to a carriage which is liastened to the endless band 4and cooperates with adjustable cams andstops in such a manner that the grippers follow the movement ot' the platen, are opened, catch the sheet, close on it and n'ally deliver the sheet, lto a receiving table, vsubstantially as described.

Cil

ln a platen lpress the combination of a cylinder inlring arrangement, a platen, endless bands adapted to rotate around 'the center ole the press, and a number ot Vinking rollers secured. to the said bands by means or carriages in order to rotate laroundfthe center of the pressfso that the inlring rollers during their travel rotate on the surface oi theink cylinder, and furthermore of rollers adapted to lsupply the ink: cylinder with ink, and or a wheel which is pivoted to the gripper carriage and cooperates with stops so as to turn it by steps for the purpose of turn ing the sheet, while the grippers, by means of cog-wheelv transmission, are also turned and iinally opened by means of stops which causes them to drop the sheet on a receiving table, and the arrangement ythat the wheel during its continued movement is turned by suitable stops in such a manner that the grippers return to their initial position, substantially as described.

5. In a platen pressvthe combination of a Cylinder inking arrangement, a platen, endless bands adapted to rotate around the oenter of the press, and a number of inking rollers secured to the said means of conveyance by means of carriages in order to rotate around the center of the press so that the inking rollers during their travel rotate on the surface of the ink cylinder, and furthermore of rollers adapted to supply the ink cylinder with ink, grippers connected by means of a pivoted holder to a ear riage which is fastened to the endless band,l

and weight operated rubber tipped arms connected by means of a carriage to the endless band in advance of the grippers so that they can be applied lto the upper part of the sheet While the grippers eateh the latter which is then guided 0H' the platen by the arms, and delivered to a receiving tab-le, the arms being led to the sheet by means `of Weights and actuated by means of a lever and adjustable stops, substantially as described.

In testimony whereof I aiix my signature in presence of two Witnesses.

EDUARD GRoss-E. l

Witnesses C. LANDESKROENER, HELENE LEHMANN. 

